Some regressions in function printing on 1.5

[KristofferC]

From https://github.com/JuliaDebug/Debugger.jl/pull/263

- |About to run: (inner_kw)(1, 2; c=5)
+ |About to run: (var"#inner_kw##kw"())((c = 5,), inner_kw, 1, 2)

-In inner_kw(a, b; c, d) at ui.jl:56
+|In #inner_kw#10(c, d, , a, b) at ui.jl:55

-|About to run: (g_invoke)(1, 2, 3, 4, 5)
+|About to run: (Core._apply_iterate)(iterate, g_invoke, (1, 2), (3,), [4, 5])